User's Manual

CHAPTER 2
APPLICATION PROGRAMMING
Revised: 10 May 01 2-2
SYSTEM CONFIGURATIONS
The ESTeem Model 192E can be used in a variety of
network system configurations. The ESTeem can stand
alone as the center of a wireless infrastructure, can
provide access from your wireless network to your wired
LAN, or bridge between Ethernet segments on your
network.
The Model 192E can also be configured as a repeater in
the network to increase the range of the wireless
infrastructure. The maximum communications range is
based upon how you configure your wireless network.
This section of the manual will describe the possible
configurations of the wireless network.
ACCESS POINT CONFIGURATION
In this network one of the ESTeem Model 192E modems
is configured as the “Access Point”. This Access Point is
then used to bridge wireless network to the cabled LAN
network or act as the center point on a stand alone
wireless network. When configured in this type of
network, all wireless cards (ESTeem Model WLANC11)
communicate only with the Access Point that serves the
WLAN as a HUB. This type of network can extend the
range of the wireless cards greater than they can directly
communication with each other.
The Access Point is responsible for maintaining a logical
link between the clients and providing the wireless
clients with access to information on the wired LAN
network. Figure 1 shows and example of the Model
192E in an Access Point Configuration.
ETHERNET BRIDGING CONFIGURATION
The Ethernet Bridging network allows the Model 192E
modems to provide links between two or more Ethernet
segments on a network. Ethernet segments can be either
single network clients such as computers or PLCs or ties
into building LAN networks such as HUBs or switches.
This type of network can provide tremendous flexibility
in your wireless network configurations and also provide
a much greater range than available through the wireless
card network as described in the Access Point section.
Figure 2 shows an example of an Ethernet Bridging
network.
COMBINED ACCESS POINT AND
ETHERNET BRIDGING CONFIGURATION
As the name would imply, this type of network is a
combination of an Access Point network and an Ethernet
Bridging network. This type of network would prove
both communication to a Building LAN network from a
remote Model 192E and also provide wireless access to
the network for the wireless cards. This type of network
requires two ESTeem Model 192E modems and at least a
three port Ethernet HUB. Figure 3 shows a combined
network.
Ethernet Wired LAN
Mobile Wireless Network With
Overlap Coverage
192E
Model WLANC11 Wireless
LAN Card
192E
10
BASE-T
10
BASE-T
Figure 1: Access Point Network
Point to Multi-Point Wireless Network
10
BASE-T
192E
Ethernet Wired LAN
Wireless Access Point
Programming
Terminal
HMI Terminal
Remote PLC
Remote PLC
192E
192E
Ethernet Wired LAN
LAN Bridging
Digi-Repeating
192E
Figure 2: Ethernet Bridging Network